From patchwork Fri Mar 14 10:31:16 2025 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Luca Ceresoli X-Patchwork-Id: 14016605 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from gabe.freedesktop.org (gabe.freedesktop.org [131.252.210.177]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.lore.kernel.org (Postfix) with ESMTPS id E9D2FC35FF1 for ; Fri, 14 Mar 2025 10:31:48 +0000 (UTC) Received: from gabe.freedesktop.org (localhost [127.0.0.1]) by gabe.freedesktop.org (Postfix) with ESMTP id 49ECA10E98C; Fri, 14 Mar 2025 10:31:46 +0000 (UTC) Authentication-Results: gabe.freedesktop.org; dkim=pass (2048-bit key; unprotected) header.d=bootlin.com header.i=@bootlin.com header.b="YmF9+RVL"; dkim-atps=neutral Received: from relay5-d.mail.gandi.net (relay5-d.mail.gandi.net [217.70.183.197]) by gabe.freedesktop.org (Postfix) with ESMTPS id 0258010E99E for ; Fri, 14 Mar 2025 10:31:42 +0000 (UTC) Received: by mail.gandi.net (Postfix) with ESMTPSA id 5A8AF4427F; Fri, 14 Mar 2025 10:31:39 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=bootlin.com; s=gm1; t=1741948301; h=from:from:reply-to:subject:subject:date:date:message-id:message-id: to:to:cc:cc:mime-version:mime-version:content-type:content-type: content-transfer-encoding:content-transfer-encoding: in-reply-to:in-reply-to:references:references; bh=BHOlyh761y5bpg3sWSdpyyGdp5isJuHXbyNPE7yDcas=; b=YmF9+RVLBmgkU16GTnhcx1yLjXLkTvo9QV6253ZXlAEKOWpUA0nwa8c4VfhpGX5CDcz6Nu UTu0lZu7SfDrv5JC/0D5ahp3FysygD6ZaNCayCygcI3z6PjgyjutvEarI1F8kFfanYY2MB WtAh2JkX2BJnm9dwbbbnvEGWiuihcSDWjWCza4kjdL4KfupxgnZTsfZWSZZvoKAiRfw1tu tY49NhrHFOwcquU/X4o5SSSpDk3ab3jLlTjEsHe6AgL44HSwqvUIY2/kZDWtcCx5BnSiVe Ax9JAIO3UvYzoQggIFKlvWJrWq5/RcZuiVfdrhYMQBq1kWkQLGV1YssGY8b9iw== From: Luca Ceresoli Date: Fri, 14 Mar 2025 11:31:16 +0100 Subject: [PATCH v7 03/11] drm/bridge: get/put the bridge reference in drm_bridge_add/remove() MIME-Version: 1.0 Message-Id: <20250314-drm-bridge-refcount-v7-3-152571f8c694@bootlin.com> References: <20250314-drm-bridge-refcount-v7-0-152571f8c694@bootlin.com> In-Reply-To: <20250314-drm-bridge-refcount-v7-0-152571f8c694@bootlin.com> To: Andrzej Hajda , Neil Armstrong , Robert Foss , Laurent Pinchart , Jonas Karlman , Jernej Skrabec , Maarten Lankhorst , Maxime Ripard , Thomas Zimmermann , David Airlie , Simona Vetter , Marek Vasut , Stefan Agner , Shawn Guo , Sascha Hauer , Pengutronix Kernel Team , Fabio Estevam , Inki Dae , Jagan Teki , Marek Szyprowski Cc: Thomas Petazzoni , Anusha Srivatsa , Paul Kocialkowski , Dmitry Baryshkov , =?utf-8?q?Herv=C3=A9_Codina?= , Hui Pu , dri-devel@lists.freedesktop.org, linux-kernel@vger.kernel.org, imx@lists.linux.dev, linux-arm-kernel@lists.infradead.org, Luca Ceresoli X-Mailer: b4 0.14.2 X-GND-State: clean X-GND-Score: -100 X-GND-Cause: gggruggvucftvghtrhhoucdtuddrgeefvddrtddtgddufedtiedtucetufdoteggodetrfdotffvucfrrhhofhhilhgvmecuifetpfffkfdpucggtfgfnhhsuhgsshgtrhhisggvnecuuegrihhlohhuthemuceftddunecusecvtfgvtghiphhivghnthhsucdlqddutddtmdenucfjughrpefhfffugggtgffkfhgjvfevofesthejredtredtjeenucfhrhhomhepnfhutggrucevvghrvghsohhlihcuoehluhgtrgdrtggvrhgvshholhhisegsohhothhlihhnrdgtohhmqeenucggtffrrghtthgvrhhnpeeiieeuvdfftefgueduleehueetgffgjeeitedtteetkeeuueeuueekveevvdeuveenucfkphepvdgrtddvmeeijedtmedvtddvtdemvggrtddumegrtddtvdemudgsrgejmeegkehfjeemudeltgehnecuvehluhhsthgvrhfuihiivgepudenucfrrghrrghmpehinhgvthepvdgrtddvmeeijedtmedvtddvtdemvggrtddumegrtddtvdemudgsrgejmeegkehfjeemudeltgehpdhhvghloheplgduledvrdduieekrddujeekrdduudekngdpmhgrihhlfhhrohhmpehluhgtrgdrtggvrhgvshholhhisegsohhothhlihhnrdgtohhmpdhnsggprhgtphhtthhopeefuddprhgtphhtthhopefjuhhirdfruhesghgvhhgvrghlthhhtggrrhgvrdgtohhmpdhrtghpthhtohepihhnkhhirdgurggvsehsrghmshhunhhgrdgtohhmpdhrtghpthhtohepmhgrrhgvgiesuggvnhigrdguvgdprhgtphhtthhopehjvghrn hgvjhdrshhkrhgrsggvtgesghhmrghilhdrtghomhdprhgtphhtthhopehprghulhhksehshihsqdgsrghsvgdrihhopdhrtghpthhtoheprghsrhhivhgrthhssehrvgguhhgrthdrtghomhdprhgtphhtthhopehmrhhiphgrrhgusehkvghrnhgvlhdrohhrghdprhgtphhtthhopehjohhnrghssehkfihisghoohdrshgv X-GND-Sasl: luca.ceresoli@bootlin.com X-BeenThere: dri-devel@lists.freedesktop.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: Direct Rendering Infrastructure - Development List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: dri-devel-bounces@lists.freedesktop.org Sender: "dri-devel" drm_bridge_add() adds the bridge to the global bridge_list, so take a reference for that. Vice versa in drm_bridge_remove(). Signed-off-by: Luca Ceresoli Reviewed-by: Maxime Ripard --- Changes in v7: - in v6 this was part of "drm/bridge: add support for refcounted DRM bridges", now split to a separate patch --- drivers/gpu/drm/drm_bridge.c | 4 ++++ 1 file changed, 4 insertions(+) diff --git a/drivers/gpu/drm/drm_bridge.c b/drivers/gpu/drm/drm_bridge.c index 2ba0dac9bfc2dfd709d5e2457d69067c7324972c..72fa51d4dd2337f97c2bd65cfabf9cee05b661b4 100644 --- a/drivers/gpu/drm/drm_bridge.c +++ b/drivers/gpu/drm/drm_bridge.c @@ -259,6 +259,8 @@ EXPORT_SYMBOL(__devm_drm_bridge_alloc); */ void drm_bridge_add(struct drm_bridge *bridge) { + drm_bridge_get(bridge); + mutex_init(&bridge->hpd_mutex); if (bridge->ops & DRM_BRIDGE_OP_HDMI) @@ -306,6 +308,8 @@ void drm_bridge_remove(struct drm_bridge *bridge) mutex_unlock(&bridge_lock); mutex_destroy(&bridge->hpd_mutex); + + drm_bridge_put(bridge); } EXPORT_SYMBOL(drm_bridge_remove);